At the top of Viewing screen

Several close verticle lines run across the screen approximately 4" or 5" down from the top of the viewing screen. Any help would be greatly appreciated.
Thanks in advance
Ernest Martin
hitchhiker49@hotmail.com

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A solid blue line would imply that the lower buffer PCB has a loose connector or a bad buffer. Some plasma TV have these buffer ICs build right into the ribbon connector of the panel. At any rate, if you plan to have the TV repaired, STOP USING IT. Plasma panels are notorious for burn-in when viewing stationary images (station logos, video games, etc.). The blue line IS stationary and if you keep watching it, you will see the effects even after you correct the original problem.

i'm no expert by any means; but I wonder if it could be as simple as the reflective screening on the inside comming loose. I have a 65" and I took it apart to clean it. The reflective screening looked to me like it could be a weak point. Just a thought.

The TV is in the DEMO mode. Many sets have a demo mode, and they are all turned on and off differently. I do not recall exactly how it is done on the Toshiba, but if you look in your owner's manual or go through all pages of the menu, you should be able to find the option for demo mode and be able to turn it off.

These beasts are monsters to get into and service without the proper extenstion cables and a service manual. there are no user replaceable parts inside this set. if you know solid state serviceing, you can try and fix it. There is a bad capacitor or capacitors in the vertical sweep circuit and or the vertical output IC is bad also. If you can solder and unsolder go for it. But if you do not or know how the circuit Works Please find a trained tech to assist you with this repair. Good Luck.
PS please do not forget to rate this.

My television has sound but no picture. I can not program the television because I can not see the screen menu. I also have tried to change the antennae but this does nothing to the picture's reception.